Ignition roof for traveling grate boiler plants



May 19, 1931. R. POTH 1,806,022

I IGNITION ROOF FOB TRAVELINGGRATE BOILER PLANTS Filed Oct. 5, 1926 1 /27 Fig.1. 4 8 1 2 p g *4 w K A a-TQ I A 25 frzverzio r: RPcM Patented May 19, 1931 momma row, or noarmmn, Gasman remron noosroa ranvnnme eanrn norms rmrs Application filed October 5, 1928, Serial No.

Furnace chamber roofs for boiler plants are known, wherein a refractory body formmg the entire roof is suspended from iron suspending members. Such iron suspending members are not advantageous because when heating the roof they expand difierently to the coherent refractory roof body. Moreover, the iron suspending members cannot resist the great heat but are destroyed in a short time. Tests have shown that such destruction also takes place when the suspending members are completely embedded in the roof boggg. ese drawbacks are obviated by the present invention according to which an ignition arch for traveling grate boiler plants is produced which consists of a coherent refractory body andrefractory supporting bricks for the same, which intimately cohere with the body. The use of the refractory supporting bricks instead of iron suspendin members for supporting the arch body as the advantage'that durlng the varying temperature in the furnace chamber the supporting bricks expand or contract to the same extent as the arch body. Moreover, the supporting bricks may be subjected to the same temperature as the arch body without burning or. suffering any damage.

An embodiment of the invention is shown in the accompanying drawings by way of example, in w ich:

Figure 1 is a longitudinal section through an arch according to the invention.

Figure 2 is an elevation of a supporting brick.

Figure 3 is a plan view of the brick;

Several main 'rders 8 are arranged above a furnace cham r A of a boiler plant not shown and auxiliary girders 8a are arranged transversely to the' main girders. Sup rting bricks 17, 25 are movabl sus-. pendb d on the auxiliary girders. comprise (Figs. 2 and 3) a shank 17 of circular or polygonal cross section with a sus nsion openin 17 and a head 18.

order to pro ace the arch accord n to the invention, the main and auxiliar g1r ers 8 and 8a are laid and the bricks 1 and 25 so suspended therefrom. Additional bricks 26 The ricks 139,740, and in Germany October 17, was;

and 27 of a construction similar to the bricks 17 and 25' may be arranged on 'rders 4: in

the manner as indicated in the rawing.

A boarding (not shown) is then provided underneath thevheads 18 of the bricks 17 and 25 in such a manner that it bears against the outer faces of the heads. A plastic mass consisting, for instance, of finely round burntmagnesite (M'gCO silicate o alkali (water glass) asbestos, dolomite (CaMgGOa) and water is placed and stamped on the boarding and between the supporting bricks. Apertures 2 are simultaneously formed in the mass through which air for cooling may subsequently enter. The composition of the mass is not always the same but depends on the fuel used.

The mass '1 stamped between the bricks becomes intimately combined with the bricks during its drying process so that when dried it forms with the bricks a solid coherent body. The boarding is next removed and the arch thus produced is supported only by the bricks. J

In a further constructional form, another head 19 may be provided on the surface of the head 18 of the bricks 17 the said head 19 extending into a layer 3 and holding the same. The layer 3 is made of a mass similar to that described above and is refractory. 1

It is also possible when producing the body '1- to form therein apertures 20 with projecting corners 21. When applying the layer 3, the said apertures are filled with the latter and also assist in supporting the same.

I claim 1. An ignition arch for traveling grate boiler plants comprising in combination main girders arranged above the furnace chamber, auxiliary girders extending transversely of the main girders, supporting bricks including shanks having heads at one end and openings at the opposite end receiving the auxiliary girders whereby the supporting bricks are movably suspended. thereon, a coherent body fillingb the space between the bricks, said body eing supported by the heads of the bricks and forming with the lattar a body constituting the top on mse aigm 1011 are or rave grate boiler plants compris'in .in colb b mation 5 main g rders arranged a ve the furnace Y chamber, auxiliary girders extending transversely of the main rders, su porting bricks including shanks aving hea s at one end and openin at the opposite end receiving the am 'ary girders whereby the supporting bricks are movably suspended thereon, a coherent bod filling the space between the bricks, sai body being supported by the heads of the bricks and form- 15 ing with the latter a body constituting the top of the furnace chamber, said body having cavities therein to increase the heat radiatingsurface thereof.

Intestimony whereof I afiix 111 Si ature. 20 RICHARI; TH.. 

